3(x^2-1) + 4(x^2 - 3) = 13
solve for x
2 answers:
Answer:
x=2, x=-2
Step-by-step explanation:
3x²-3+4x²-12=13
7x²=13+12+3
7x²=28
x²=4
x=-2
x=2
X =-2 should bring the correct answer
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